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uses: actions/checkout@v4\n  - uses: mpi4py/setup-mpi@v1\n  - run: mpicc helloworld.c -o helloworld\n  - run: mpiexec -n 2 ./helloworld\n```\n\nMatrix Testing:\n\n```yaml\njobs:\n  build:\n    runs-on: ubuntu-latest\n    strategy:\n      matrix:\n        mpi: [ 'mpich', 'openmpi', 'intelmpi']\n    name: ${{ matrix.mpi }} example\n    steps:\n      - name: Checkout\n        uses: actions/checkout@v4\n      - name: Setup MPI\n        uses: mpi4py/setup-mpi@v1\n        with:\n          mpi: ${{ matrix.mpi }}\n      - run: mpicc helloworld.c -o helloworld\n      - run: mpiexec -n 2 ./helloworld\n```\n\n# Available MPI implementations\n\n* Linux:\n  [MPICH](https://www.mpich.org/),\n  [Open MPI](https://www.open-mpi.org/), and\n  [Intel MPI](https://software.intel.com/intel-mpi-library) (`apt` install).\n\n* macOS:\n  [MPICH](https://www.mpich.org/) and\n  [Open MPI](https://www.open-mpi.org/) (`brew` install).\n\n* Windows:\n  [Microsoft MPI](https://docs.microsoft.com/en-us/message-passing-interface/microsoft-mpi) and\n  [Intel MPI](https://software.intel.com/intel-mpi-library).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmpi4py%2Fsetup-mpi","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmpi4py%2Fsetup-mpi","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmpi4py%2Fsetup-mpi/lists"}